Why is your silk screen showing R1 as 680K ?Mounting holes added, board size increased to 50mm x 30mm.
I have a version of the circuit that Hatsune Mike designed. 300wins loaned to me. It works to solve my issues with the F3 and Sanwa PFX monitor. So we know the stated parts work.Damn. Maybe try adjusting some of the values to change the timing somewhat?!